“Whatever creates or increases happiness or some part of happiness, we ought to do; whatever destroys or hampers happiness, or gives rise to its opposite, we ought not to do.” ― Aristotle, Rhetoric
“Because thou writest me often, I thank thee ... Never do I receive a letter from thee, but immediately we are together.” ― Seneca, Letters from a Stoic
“The longer the span of someone’s existence, the more certain he is to see and suffer much that he would rather have been spared.” ― Herodotus, The Histories
“It is through wonder that men now begin and originally began to philosophize; wondering in the first place at obvious perplexities, and then by gradual progression raising questions about the greater matters too.” ― Aristotle, Metaphysics